Chu, Daoliang
Tong, Jinnan
Song, Haijun
Benton, Michael J.
Bottjer, David J.
Song, Huyue
Tian, Li
Article History
Received: 3 October 2014
Accepted: 30 March 2015
First Online: 9 June 2015
Competing interests
: The authors declare no competing financial interests.